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avcodec/ffv1dec: Fix integer overflow in read_quant_table()

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Fixes: runtime error: signed integer overflow: 2147483647 + 1 cannot be represented in type 'int'
Fixes: 3361/clusterfuzz-testcase-minimized-5065842955911168

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2017-09-18 17:26:09 +02:00
parent 2c933c5168
commit d00fc952b6
1 changed files with 1 additions and 1 deletions
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libavcodec/ffv1dec.c
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@ -372,7 +372,7 @@ static int read_quant_table(RangeCoder *c, int16_t *quant_table, int scale)
memset(state, 128, sizeof(state));
for (v = 0; i < 128; v++) {
unsigned len = get_symbol(c, state, 0) + 1;
unsigned len = get_symbol(c, state, 0) + 1U;
if (len > 128 - i || !len)
return AVERROR_INVALIDDATA;